Centos installation Java Configuration environment variables

Centos installation Java Configuring environment Variables

1. View the system version

[Email protected] ~]# java-version

Java Version "1.6.0_24"

OpenJDK Runtime Environment (IcedTea61.11.5)

(rhel-1.45.1.11.1.el6-3-i386)

OpenJDK 64-bit Server VM (build 20.0-b12,mixed mode)

2. further review of JDK information

[Email protected] ~]# Rpm-qa | grep java

Tzdata-java-2012j-1.el6.noarch

java-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.i686

3. uninstalling the old version of the JDK

[Email protected] ~]# rpm-e--nodepstzdata-java-2012j-1.el6.noarch

[Email protected] ~]# rpm-e--nodepsjava-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.i686

4. Installing the JDK

Upload The downloaded jdk package to/usr/local/java below and unzip the tar xvf jdk-7u79-linux-x64.gz

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(jdk-7u79-linux-x64.gz is a package;jdk1.7.0_79 is the extracted directory)

5. Configure environment Variables

Modify The/etc/profile file,

Vi/etc/profile

At the end, add the following:

Directory of java_home=/usr/local/java/jdk1.7.0_79//java

BIN directory of java_bin=/usr/local/java/jdk1.7.0_79/bin //java

Path= $PATH: $JAVA _bin

Classpath= $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar

Export Java_home java_bin PATH CLASSPATH

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6. making the changes effective

[[email protected] local]# source/etc/profile// make changes effective immediately

[[email protected] local]# echo $PATH// view PATH value

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7. Review The Java version and verify java.

Java–version

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This article is from "Yangdong Hao" blog, please make sure to keep this source http://506554897.blog.51cto.com/2823970/1732110

Centos installation Java configuration environment variables